> For the complete documentation index, see [llms.txt](https://docs.apryse.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.apryse.com/android/layers-ocgs/extract-layer.md).

# Extract layers from PDF in Android

Learn how to extract PDF layers or OCG (optional content group) from a document with this comprehensive guide. Get full sample code for creating, extracting, and rendering PDF layers. The Apryse Andro

To extract PDF layers or OCG (optional content group) from a document.

{% tabs %}
{% tab title="Java" %}
{% code lineNumbers="true" %}

```java
PDFDoc doc = new PDFDoc(filename);
Page page = doc.getPage(1);

Config init_cfg = doc.getOCGConfig();
Context ctx = new Context(init_cfg);

PDFDraw pdfdraw = new PDFDraw();
pdfdraw.setImageSize(1000, 1000);
pdfdraw.setOCGContext(ctx); // Render the page using the given OCG context.

// Disable drawing of content that is not optional (i.e. is not part of any layer).
ctx.setNonOCDrawing(false);

// Now render each layer in the input document to a separate image.
Obj ocgs = doc.getOCGs(); // Get the array of all OCGs in the document.
int i, sz = (int) ocgs.size();
for (i = 0; i < sz; ++i) {
    Group ocg = new Group(ocgs.getAt(i));
    ctx.resetStates(false);
    ctx.setState(ocg, true);
    String fname = "pdf_layers_" + ocg.getName() + ".png";
    pdfdraw.export(page, output_path + fname);
}

// Now draw content that is not part of any layer...
ctx.setNonOCDrawing(true);
ctx.setOCDrawMode(Context.e_NoOC);
pdfdraw.export(page, output_path + "pdf_layers_non_oc.png");
```

{% endcode %}
{% endtab %}

{% tab title="Kotlin" %}
{% code lineNumbers="true" %}

```kotlin
val doc = PDFDoc(filename)
val page = doc.getPage(1)

val init_cfg = doc.ocgConfig
val ctx = Context(init_cfg)

val pdfdraw = PDFDraw()
pdfdraw.setImageSize(1000, 1000)
pdfdraw.setOCGContext(ctx) // Render the page using the given OCG context.

// Disable drawing of content that is not optional (i.e. is not part of any layer).
ctx.setNonOCDrawing(false)

// Now render each layer in the input document to a separate image.
val ocgs = doc.ocGs // Get the array of all OCGs in the document.
var i: Int
val sz = ocgs.size().toInt()
i = 0
while (i < sz) {
    val ocg = Group(ocgs.getAt(i))
    ctx.resetStates(false)
    ctx.setState(ocg, true)
    val fname = "pdf_layers_" + ocg.name + ".png"
    pdfdraw.export(page, output_path + fname)
    ++i
}

// Now draw content that is not part of any layer...
ctx.setNonOCDrawing(true)
ctx.setOCDrawMode(Context.e_NoOC)
pdfdraw.export(page, output_path + "pdf_layers_non_oc.png")
```

{% endcode %}
{% endtab %}
{% endtabs %}

[PDF layers (OCG)](/android/get-started/samples.md#pdflayers) Full sample code which demonstrates how to create, extract, render PDF layers.


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